Bernhard frohlich



Patented Nov. l5, I898. B; FRUHLICH.

PARALLEL V|SE. (Application filed on. 4, 1897 (No Model.)

Nrrnn STATES PATENT Fries.

BERNHARD FRGHLICH, OF 'LEIPSIO, GERMANY.

PARALLEL VISE.

SPECIFICATION formingpart of Letters Patent No. 614,298, dated November 15, 1898.

Application filed October 4, 1897. v Serial No. 654,031- (No model.)

To all whom it may concern:

Be it known thatI, BERNHARD FRoHLIoH, a citizen of Germany, residing at Leipsic, Neu stadt, Kingdom of Saxony, Germany, have invented certain new and useful Improvements in Parallel Vises, (for which I have obtained Letters Patent in England, dated September 25, 1897, No. 19,145; in France, dated January 13, 1898, No. 270,766; in Belgium, dated September 30, 1897, No. 130,582, and in Hungary, dated March 16, 1898, No. 11,056,) of which the following is a specification.

This invention relates to bench-Vises of that class in which one jaw is arranged to move parallel to the other jaw; and the object of the invention is to provide in Vises of this class means for guiding the jaws so that in operation they approach each other without change of parallelism or compression of the actuating portions of the vise.

To this end the invention consists of a Vise comprisinga stationary jaw, a movable jaw, a screw-spindle for operating said movable jaw, and pivot-straps for guiding said movable jaw parallel to said stationary jaw, said straps being pivoted at their upper ends to said jaws on a line above said spindle, while their lower ends are guided in slots of said. jaws below said spindle.

In the accompanying drawings, Figure 1 is a side elevation of my improved vise, showing the same in open position. Fig. 2 is also a side elevation showing it in closed position, and Fig. 3 is a rear elevation of the same.

Similar letters of reference indicate corresponding parts.

Referring to the drawings, a represents the stationary jaw of my improved vise, which is securely attached to the work-bench or other support in any-suitable manner and which is provided in its lower portion with a vertical slot Z and at its middle portion with a transverse screw-threaded opening adapted to receive the screw-spindle of the vise. The movable jaw of the vise b is similar in form to the stationary jaw and is likewise provided at its lower portion with a vertical slot m, corresponding to the slot 5 of the stationary jaw, and with a transverse opening adapted to receive the screw-spindle, said opening, however, being not provided with a screw-thread.

The screw-spindle c is of the usual form and is passed through the opening in the movable jaw and screwed into the corresponding opening provided in the stationary jaw. Pivot rods or straps d and e are located at each side of the vise and are pivoted thereto at their upper ends by means of the pins 9 and h, which are located above the spindle 0, so as to be in close proximity to the jaws. Each of these pivot-straps crosses diagonally to the lower portion of the opposite jaw, and the strap 61 is offset, as indicated in Fig. 3, to pass over the strap 6. The pivots 7c and 1' are adapted to slide in the slots m and Z, respectively.

The operation of the vise will be readily understood in connection with the drawings. As the screw-spindle is turned the movable jaw approaches the stationary jaw a, the bolts and 'i descend regularly in the slots m and l to the bottom or nearly to the bottom of the same, and the jaws finally meet, as shown in Fig. 2. The pivot-straps serve to retain the jaws parallel to each other during the operation, sorthat no turning of the movable jaw on the spindle takes place. When the vise is in use and an object grasped between the jaws under pressure, the advantages of the pivot-straps are still further brought out. It will be noticed that the pivots g and h are above the spindle and adjacent to the upper portion and gripping-faces of the jaws. By this arrangement the lower endsof the jaws are retained at the same distance from each other as the gripping-faces, and hence the latter under pressure remain parallel with each other, and a firm and even grip on the object is secured. Both the pivot-straps are subjected to tensile strain, and thereby the bending of the spindle by the parallel motion of the jaws positively prevented. This they are enabled to do successfully by reason of the fact that they are pivoted above as well as below the spindle, thus securing the movable jaw at both sides of the spindle against turning movement.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- Avise,consisting of astationaryjaw, a movable jaw, a screw-spindle for operating said movable jaw, and pivot-straps for guiding In testimony whereof I have signed my said movable jaw parallel to said stationary name to this specification in the presence of jaw, said pivot-straps being pivoted at their two subscribing, witnesses.

upper ends to said jaws above said spindle, BERNHARD FROHLIOI-I. and having their lower ends guided in slots \Vitnesses:

of said jaws below said spindle, substantially RUDOLPH FRIOKE, as set forth. EMIL ZIEGER. 

